Avers : 1- The coinage of the roman republic, Edward Allen Sydenham, 1975. 2- Katalog römischer münzen, B. Ralph Kankelfitz. 3- Byzantine coins and their values, David R. Sear, Edition de 1974. 4- Roman coins and their values, David R. Sear, édition révisée 1970. 5- roman coins and their values, David R. Sear, édition de 1974. 6- Roman coins and their values, David R. Sear, édition de 1988.